Free efficient software for linux

GNOME Office is the premier suite of office productivity applications designed for the GNOME desktop environment.
Some of the applications also can run on Windows or Mac OS X. They provide powerful, efficient office productivity capabilities as free (GPL) software.
Main features:
- AbiWord word processor
- Gnumeric spreadsheet
- Gnome-DB data access components

phpWebTickets provides a partial rewrite of phpSupport.
phpWebTickets is a partial rewrite of phpSupport by Chris S. It sports a templated design using Smarty, cleaned up code, and added features.
Features will be added after the initial movement to Smarty and code cleanup have occurred, but small improvements will most likely sneak their way in there during the migration.
Main features:
- Simplicity of functionality
- Multilingual Interface
- Full email notification functionality (sending and recieving)
- Fast and Easy Setup
- Read the original phpSupport site for more information
- Templated User Interface (using Smarty)
- CSS
- Cleaner code layout (less confusing if you want to mod)
- A more efficient DB design
- Overall code rework... in particular:
- Rework the current queries so they are more efficient
- Remove superfluous code
- Put reusable code into functions
Enhancements:
- Code cleanups and cosmetic changes were made.
- The ticket filter and ticket listing sections were rewritten and the font tags were changed to use CSS.
- The templates were also cleaned up.

SiteInvoice project helps you manage your customer invoices in a simple and efficient manner.

Customers receive personalized email notices with invoices attached as PDFs, with reminders sent at 30, 45, and 60 days.

Handles multiple currencies and taxes. Never lose track of money you or your company are owed again.

SNPfile is a library and API for manipulating large SNP datasets with associated meta-data, such as marker names, marker locations, individuals phenotypes, etc. in an I/O efficient binary file format.

In its core, SNPfile assumes very little about the metadata associated with markers and individuals, but leaves this up to application program protocols.

This project is released under the GNU General Public License.

feresPost is a Ruby extension that provides the definition of classes and modules devoted to the development of automated post-processing for Nastran finite element results.
feresPost library allows easy manipulation of finite element models, groups, and results. Efficient post-processing is possible because the time-consuming operations are written in C/C++.
Enhancements:
- Bugs in the reading of xdb and bdf files have been fixed.
- The classes devoted to the composite calculations were reorganized.

SGet is a GTK+ application to download files over the Internet by segments, which makes the download process more efficient in most cases.

On this project, the final objective is to write a program to download files over the net by segments, wich offers a improved speed for downloads.

Window Manager Icons purpose of the wm-icons project is to provide a themeable icon distribution for window managers.
Main features:
- Providing an efficient configurable icons distribution.
- Creating a framework for easy configurable icon themes.
- Staying window manager independent, but with fvwm in mind.
- Releasing the distribution under GPL.

Requirements: Qt 4.x